CN112605706A

CN112605706A - Machine tool

Info

Publication number: CN112605706A
Application number: CN202011022449.XA
Authority: CN
Inventors: 佐野巌根; 松浦稔; 渡边正辉
Original assignee: Brother Industries Ltd
Current assignee: Brother Industries Ltd
Priority date: 2019-10-03
Filing date: 2020-09-25
Publication date: 2021-04-06
Anticipated expiration: 2040-09-25
Also published as: JP7230763B2; JP2021058944A; CN112605706B

Abstract

The present invention relates to a machine tool having a machine tool body and a shield covering the machine tool body. The machine tool comprises: a machine tool main body; a shield enclosing the machine body and having a top and a sidewall; and an opening/closing door provided on the side wall and moving in a direction orthogonal to a thickness direction of the side wall, wherein the machine tool includes a plate member extending in a vertical direction and attached to an end surface of the opening/closing door in the moving direction. The plate member has a first edge portion extending in the up-down direction. A comb portion having at least one tooth is formed at the first edge portion. The teeth project towards the inside of the shield. The upper edge of the tooth is inclined so that the protruding end side is lower than the root side.

Description

Machine tool

Technical Field

The present invention relates to a machine tool having a machine tool body and a shield covering the machine tool body.

Background

A machine tool has a spindle equipped with a tool, and the machine tool performs cutting processing on a workpiece using the tool. The machine tool sprays a coolant to the tool or the workpiece to cool heat generated when the workpiece is machined. When a workpiece is machined, chips are generated in addition to heat. The spray of coolant can wash away chips adhering to the tool or workpiece. The machine tool has a shield covering the machine tool body to prevent splashing of coolant and scattering of chips. The swarf can adhere to the inner surface of the shroud. The machine tool sprays cooling liquid to the inner surface of the shield to remove chips adhering to the inner surface of the shield. Japanese laid-open patent publication No. 2015-182176 discloses a machine tool having a tank, a filter, and a pump. The tank is used for storing cooling liquid. The cooling liquid stored in the machine tool spraying box is filtered by the filter, and the filtered cooling liquid is sent into the box by the pump. The machine tool recovers the used cooling liquid and reuses the cooling liquid.

Japanese patent application laid-open No. 2015-205385 discloses a machine tool having a guard, an opening/closing door, and a workpiece exchanging device. The opening and closing door is arranged on the side wall of the shield, and the workpiece exchanging device is positioned on the outer side of the shield. The work exchange device carries the work into and out of the shield in conjunction with the opening and closing of the opening and closing door. The operator is not required to enter the inside of the shroud for carrying in and out the workpiece, and therefore the safety of the machine tool is high.

The sprayed coolant adheres to the inner surfaces of the shield and the opening/closing door. The coolant adhering to the inner surfaces of the shield and the opening/closing door moves to the outside of the shield and the outer surface of the opening/closing door due to vibration, impact, and the like associated with the opening/closing of the opening/closing door. The coolant that has moved to the outside of the shroud drips onto the ground to which the machine tool is fixed, and contaminates the ground. When the coolant moves to the outside of the shroud, the amount of the coolant that can be reused decreases, and the frequency of the coolant replenishment work increases. Therefore, the coolant is frequently replenished, and the work efficiency of the machine tool is reduced.

Disclosure of Invention

The purpose of the present invention is to prevent coolant from moving to the outside of a shield with opening and closing of an opening/closing door.

The machine tool according to claim 1 comprises: a machine tool main body; a shield enclosing the machine body and having a top and a sidewall; and an opening/closing door provided on the side wall and moving in a direction orthogonal to a thickness direction of the side wall, wherein the machine tool includes a plate member extending in the vertical direction and attached to an end surface of the opening/closing door in the moving direction, the plate member has a first edge portion extending in the vertical direction and closer to the machine tool main body side, a comb portion having at least one tooth is formed in the first edge portion, the tooth protrudes inward of the shield, and an upper edge portion of the tooth is inclined such that the protruding end side is lower than the root side.

Since the plate member is attached to the end surface of the opening/closing door, the coolant that attempts to move to the outside of the shroud through the end surface of the opening/closing door comes into contact with the comb teeth of the plate member. The coolant in contact with the comb teeth portion drops along the upper edge portions of the teeth of the comb teeth portion on the inner side of the shield. The machine tool can prevent the coolant from moving to the outside of the shroud.

The comb teeth portion of the machine tool according to claim 2 is provided at least at the upper end of the first edge portion. A mist of coolant is generated as a result of the spray of the coolant against the inner surface of the workpiece or tool or shroud. The coolant in the form of mist is likely to adhere to the inner surface of the hood near the upper portion of the opening/closing door. Since the comb teeth are provided at least at the upper end of the first edge portion, the machine tool can effectively prevent the coolant adhering to the inner surface of the shroud in the vicinity of the upper portion of the opening/closing door from moving to the outside of the shroud.

The lower edge portion of the teeth of the machine tool according to claim 3 is provided with a notch portion. The coolant in contact with the comb teeth sometimes moves to the outside of the shield along the lower edge of the teeth and the surface of the plate member without dropping on the inside of the shield. The notch prevents the coolant from moving along the lower edge of the tooth to the outside of the shield. The machine tool can effectively prevent the coolant from moving to the outside of the shroud.

The plate member of the machine tool according to claim 4 has a second edge portion extending in the vertical direction and closer to the opposite side of the first edge portion, wherein the first gap is formed below the teeth and extends along the teeth, the second gap is formed above the teeth and extends along the teeth, and the first gap extends closer to the second edge portion side than the second gap.

The coolant sometimes does not contact the comb teeth, or does not drip on the inside of the hood after contacting the comb teeth, but moves along the surface of the plate member to the outside of the hood. When the coolant moves to the outside of the shield along the surface of the plate member, the coolant moves downward by gravity. Since the first gap formed below the teeth extends closer to the second edge than the second gap formed above the teeth, the coolant moving to the outside of the shield along the surface of the plate member easily comes into contact with the edge of the gap below the comb teeth. The coolant in contact with the edge of the gap drips along the edge of the gap inside the shield. The machine tool can prevent the coolant from moving to the outside of the shroud.

The machine tool according to claim 5 comprises: a groove portion extending in the moving direction and formed on an upper side surface portion of the opening/closing door; and a drain hole formed in the groove portion for discharging the liquid to the inside of the shield.

The groove extends in the moving direction of the opening/closing door. The mist coolant is accumulated in the grooves. The coolant in the groove portion flows out from the drain hole to the inside of the shroud. The machine tool can prevent the coolant from moving to the outside of the shroud.

Drawings

Fig. 1 is a perspective view of a machine tool.

Fig. 2 is a perspective view of the machine tool body.

Fig. 3 is a front view of the door unit.

Fig. 4 is a front view of the door unit.

Fig. 5 is a rear view of the door unit.

Fig. 6 is a sectional perspective view of a door unit based on the vi-vi line of fig. 3.

Fig. 7 is an enlarged upper sectional view of the door unit based on line vii-vii of fig. 3.

Fig. 8 is an enlarged sectional view of the lower portion of the gate unit based on line viii-viii of fig. 3.

Fig. 9 is a front view of the opening and closing door.

A of FIG. 10 is a cross-sectional view taken along line X-X of FIG. 9.

B of FIG. 10 is a cross-sectional view taken along line X-X of FIG. 9.

Fig. 11 is a schematic view of the upper surface of the opening and closing door.

Fig. 12 is a schematic view of the opening and closing door as viewed from the rear.

Fig. 13 is a perspective view of an opening/closing door showing a modification of the plate member.

Fig. 14 is a perspective view of the opening/closing door of embodiment 2.

Fig. 15 is a perspective view of the opening/closing door according to embodiment 3.

Detailed Description

Embodiment mode 1

Embodiments of the present invention will be described below with reference to the drawings. In the following description, up and down, left and right, and front and back, which are indicated by arrows in the drawings, are used. As shown in fig. 1, a machine tool 100 includes: a machine tool body 1; a body cover 2 that covers the machine tool body 1; and a work exchange device 3 described later. In fig. 2, illustration of the body cover 2 and the work exchange device 3 is omitted. The machine tool body 1 has a base 11. The column 12 is provided on the rear portion of the base 11 and extends in the up-down direction. The column 12 supports a spindle head 13 at the front. The spindle head 13 protrudes forward, and the spindle head 13 moves in the vertical direction along the front surface of the column 12. The column 12 has: a feed screw that is screwed to the rear of the spindle head 13 and extends in the vertical direction; and a motor connected to the feed screw. The motor rotates the feed screw about an axis parallel to the vertical direction. The spindle head 13 moves in the vertical direction in accordance with the rotation of the feed screw.

A lower portion of the spindle head 13 holds a spindle (not shown) extending in the vertical direction so as to be rotatable about an axis parallel to the vertical direction. A spindle motor 14 connected to the spindle is fixed to an upper portion of the spindle head 13. The spindle motor 14 drives the spindle to rotate about an axis parallel to the vertical direction. A tool (not shown) is detachably attached to the lower end of the spindle. A workpiece holding portion 15 that is movable in the left-right direction and the front-rear direction is provided on the front portion of the base 11. The workpiece holding portion 15 holds a workpiece. The spindle is disposed above the workpiece holding portion 15. The tool is rotated by the rotation of the spindle, and the machine tool body 1 performs machining on the workpiece held by the workpiece holding portion 15.

The tool magazine 16 is provided in the front of the spindle head 13. The tool magazine 16 holds a plurality of tools around it, and the tool magazine 16 performs attachment and detachment of the tools to and from the spindle. A rectangular parallelepiped control device 17 is attached to the rear portion of the column 12 and controls the operation of the machine tool body 1.

As shown in fig. 1, the body shield 2 has a front wall 21, a rear wall 22, a right wall 23, a left wall 24, and a top 25, and the body shield 2 is wrapped around the machine tool body 1 on the front side, the rear side, the right side, the left side, and the upper side. The body cover 2 corresponds to a cover. The main body cover 2 includes: a main door 211; an operation unit 212 that receives an operation by an operator; and a display unit 213 for displaying an image. The front door 211 is provided at the center of the front wall 21. The operation unit 212 and the display unit 213 are provided on the front right side of the front wall 21. The control device 17 is disposed on the rear side of the rear wall 22. The control device 17 is mounted to the rear of the column 12 via an opening formed in the rear wall 22. The pump device 4 is provided below the control device 17.

The pump device 4 has a pump and a tank for storing the coolant. The pump device 4 supplies the coolant stored in the tank to the inner surface of the body cover 2 and the ejection portion of the spindle head 13, which are attached to the left surface of the right wall 23, the right surface of the left wall 24, and the like. The injection portion of the spindle head 13 injects a coolant to the workpiece or the tool during machining of the workpiece or during tool exchange, cools heat generated by machining of the workpiece, and washes away chips adhering to the workpiece or the tool. The jetting portion of the inner surface of the body shroud 2 jets the coolant toward the inner surface of the body shroud 2, and washes away the chips adhering to the inner surface of the body shroud 2. The sprayed coolant flows toward the lower portion of the machine tool body 1. The pump device 4 is connected to the lower portion of the machine tool body 1, and recovers the sprayed coolant from the lower portion of the machine tool body 1. Since the coolant collected by the pump device 4 contains chips, the pump device 4 performs a treatment such as filtration to remove the chips from the collected coolant. The pump device 4 sends the treated coolant to the tank and supplies the coolant to the spray unit again. The pump device 4 recovers the sprayed coolant and reuses it.

The right wall 23 has an opening (not shown) at the center. The opening portion of the right wall 23 is rectangular. A door unit 5 having an opening and closing door 51 is installed on the right side of the right wall 23. The opening/closing door 51 moves in the front-rear direction to perform an opening/closing operation. The front-rear direction is a direction orthogonal to the thickness direction of the right wall 23. When the opening/closing door 51 is closed, the opening of the right wall 23 is closed. The work holding portion 15 of the machine tool body 1 can be seen when the open/close door 51 is opened. The right wall 23 corresponds to a side wall.

The work exchange device 3 is disposed on the right side of the door unit 5. The work exchange device 3 has a support base 31 and an arm 32. The support base 31 is in the shape of a column extending in the vertical direction. The arm 32 is fixed to the upper end of the support base 31. The arm 32 moves in the left-right direction. A gripping portion 321 for gripping a workpiece is provided at a distal end portion of the arm 32. The work exchange device 3 exchanges the work held by the work holding portion 15 by carrying the work into and out of the main body cover 2 and carrying the work out of the main body cover 2 in conjunction with opening and closing of the opening and closing door 51.

As shown in fig. 5, the door unit 5 has a mounting plate 52, and the mounting plate 52 has a first plate 521 and a second plate 522. The first plate 521 has a rectangular shape extending in the front-rear direction. The second plate 522 is provided on the left side of the first plate 521. The second plate 522 has a rectangular shape extending in the up-down direction, and is disposed parallel to the first plate 521. The first plate 521 and the second plate 522 may be not strictly parallel but parallel with a deviation within several degrees. The front-rear direction length and the up-down direction length of the second plate 522 are smaller than the front-rear direction length and the up-down direction length of the first plate 521, respectively. The attachment plate 52 has an opening 523 that penetrates the first plate 521 and the second plate 522 in the left-right direction. The opening 523 is formed at the front-rear direction center of the first plate 521. The opening 523 has a rectangular shape extending in the vertical direction. The opening/closing door 51 is provided in the opening 523. As shown in fig. 6, the opening/closing door 51 has a rectangular parallelepiped shape open to the left side and extends in the vertical direction. The lower surface of the opening/closing door 51 is inclined so that the left side is lower than the right side. A plate member 6 described later is mounted on the rear surface of the opening/closing door 51. The door unit 5 is fixed to the right wall 23 by screw-fixing the first plate 521 and the second plate 522 to the right wall 23 in such a manner that the formation position of the opening portion 523 and the formation position of the opening portion of the right wall 23 are aligned.

As shown in fig. 3 and 4, an upper roller mechanism 53 and an upper guard 54 are provided on the upper portion of the door unit 5, the upper roller mechanism 53 supports the opening/closing door 51 so that the opening/closing door 51 can move in the front-rear direction, and the upper guard 54 covers the upper side and the right side of the upper roller mechanism 53. In fig. 4, the upper shroud 54 is not shown. As shown in fig. 7, the upper roller mechanism 53 has a guide 531, rollers 532, and roller support plates 533. The guide rail 531 is a metal rectangular plate attached to the upper right side of the first plate 521 and extending in the front-rear direction. The roller support plate 533 is a rectangular plate having a vertical width larger than that of the guide rail 531, and protrudes upward from the upper surface of the opening/closing door 51. The rollers 532 are metallic or resin disks and are provided on the upper left side of the roller support plate 533 in the front direction and the upper left side in the rear direction. The rotational axis direction of the roller 532 is the left-right direction. The circumferential surface of the roller 532 abuts against the upper surface of the guide rail 531. The rollers 532 move in the front-rear direction along the guide rails 531. Three or more rollers 532 may be provided on the upper left side of the roller support plate 533 so as to be aligned in the front-rear direction. The roller support plate 533 has a columnar contact portion 534 provided below the roller 532. The contact portion 534 is configured by rotatably fitting a cylindrical bush to a shaft body having a left-right direction as an axial direction. The circumferential surface of the contact portion 534 contacts the lower surface of the guide rail 531. The abutment portion 534 may be a disk provided to be rotatable about a left-right direction axis. Two baffles 535 extending in the front-rear direction are arranged in the up-down direction and fixed to the lower left side of the roller support plate 533. Two baffles 535 protrude leftward from the lower portion of the roller support plate 533. The baffle 536 has an L-shaped cross section, and the baffle 536 extends in the front-rear direction and is fixed near the opening 523 in the upper portion of the second plate 522. The shutter 536 has: a first plate member protruding downward from the vicinity of the opening 523 in the upper portion of the second plate 522; and a second plate member protruding rightward from the protruding end portion of the first plate member through the opening 523. The protruding end of the second plate member is located between the two baffles 535. The second plate members of the two

baffles

535 and 536 are parallel. It is also possible that the second plate members of the two

baffles

535 and 536 are not strictly parallel, but parallel with a deviation within a few degrees.

The coolant is sprayed onto the inner surface of the workpiece, the tool, or the body cover 2, thereby generating a mist of coolant. Part of the mist of the coolant attempts to move above the opening/closing door 51, but adheres to the baffle 535 or the baffle 536. The baffle 535 or the baffle 536 can prevent the mist of the coolant from moving upward of the opening/closing door 51.

As shown in fig. 8, the lower roller mechanism 55 is provided at a lower portion of the mounting plate 52. The lower roller mechanism 55 has a lower shroud 551, a guide rail supporting plate 552, a guide rail 553, a roller supporting plate 554, and rollers 555. The lower shroud 551 extends in the front-rear direction, and has: a first plate member protruding rightward from the vicinity of the opening 523 in the lower portion of the first plate 521; and a second plate member that protrudes upward from the protruding end of the first plate member to the lower portion of the opening/closing door 51. The rail support plate 552 extends in the front-rear direction, and protrudes leftward from the second plate member of the lower shroud 551. The guide support plate 552 supports the guide 553. The guide rail 553 extends in the front-rear direction, and protrudes downward from the center of the guide rail support plate 552 in the left-right direction. The opening and closing door 51 is located above the rail support plate 552. The roller support plate 554 extends in the front-rear direction, and has: a first plate member protruding downward from the lower surface of the opening/closing door 51; and a second plate member protruding rightward from the protruding end of the first plate member. The guide rail support plate 552 and the guide rail 553 are disposed above the second plate member of the roller support plate 554. The second plate member of the roller support plate 554 supports the roller 555 on the upper side. The rotation axis direction of the roller 555 is the up-down direction. Two rollers 555 are provided at each of both longitudinal end portions of the second plate member of the roller support plate 554 so as to be aligned in the left-right direction. The guide rail 553 is disposed between two rollers 555 aligned in the left-right direction. The circumferential surface of the roller 555 contacts the guide 553. The rollers 555 move in the front-rear direction along the guide rail 553. A guide plate 556 extending in the front-rear direction is disposed below the second plate member of the roller support plate 554. The guide plate 556 is inclined so that the left edge is lower than the right edge. The roller 532 moves along the guide rail 531, and the roller 555 moves along the guide rail 553, so that the opening and closing door 51 moves in the front-rear direction. The lower roller mechanism 55 restricts the swing of the opening/closing door 51 in the right-left direction. The door unit 5 has a ball screw mechanism driven under the control of the control device 17. The ball screw mechanism is connected to the opening/closing door 51. The opening/closing door 51 is driven by the ball screw mechanism to open/close (move) in accordance with the exchange of the work by the work exchange device 3.

As shown in fig. 10 a, 10B, and 11, the groove 56 is formed in the upper surface portion of the opening/closing door 51. A of fig. 10 shows the entire cross section of the opening/closing door 51. Fig. 10B shows an enlarged cross section of the upper part of the opening/closing door 51. The groove 56 extends in the front-rear direction and is disposed on the right side of the roller support plate 533. The drain hole 57 is formed at the bottom at the front end of the groove portion 56. The upper surface of the opening/closing door 51 corresponds to the upper surface of the opening/closing door 51. As described above, a part of the mist of the coolant attempts to move upward of the opening/closing door 51, but adheres to the baffle 535 or the baffle 536. The mist of the coolant that does not adhere to the baffle 535 and the baffle 536 is accumulated in the groove 56. The coolant stored in the groove 56 drops through the drain hole 57, or moves from the drain hole 57 to the upper portion of the lower surface of the opening/closing door 51 along the left portion of the right surface of the opening/closing door 51 (the portion of the right surface closer to the machine tool body 1). Since the lower surface of the opening/closing door 51 is inclined as described above, the coolant that has moved to the upper portion of the lower surface of the opening/closing door 51 moves (drips) to the lower portion of the machine tool body 1 along the upper portion of the lower surface of the opening/closing door 51. A part of the coolant drops from the lower surface of the opening/closing door 51 toward the guide plate 556. The coolant dropped on the guide plate 556 moves along the upper surface of the guide plate 556 toward the lower portion of the machine tool main body 1. The drain holes 57 drain the coolant in the groove portions 56 to the inside of the body cover 2. The pump device 4 recovers the coolant in the lower part of the machine tool body 1 and reuses it.

As shown in fig. 12, a rectangular plate member 6 is fixed to the rear surface rear side of the opening/closing door 51 (the outer side of the opening/closing door 51). The rear surface of the opening/closing door 51 corresponds to an end surface of the opening/closing door 51 in the moving direction. The plate member 6 extends in the up-down direction along the rear surface of the opening/closing door 51. The plate member 6 is fixed to the rear side of the rear surface of the opening/closing door 51 with screws.

The plate member 6 has a left edge portion 6a and a right edge portion 6 b. The left edge portion 6a and the right edge portion 6b extend in the vertical direction and are opposed to each other in the left-right direction. A comb portion 63 having three teeth 61 and three gaps 62 is formed at the upper end of the left edge portion 6 a. The three teeth 61 and the three gaps 62 are arranged at the upper end of the left edge portion 6a so as to be alternately arranged in the vertical direction. Of the three teeth 61, the upper tooth 61 is referred to as an upper tooth 61a, the central tooth 61 is referred to as a central tooth 61b, and the lower tooth 61 is referred to as a lower tooth 61 c. Of the three gaps 62, the upper gap 62 is referred to as an upper gap 62a, the central gap 62 is referred to as a central gap 62b, and the lower gap 62 is referred to as a lower gap 62 c. The left edge portion 6a corresponds to the first edge portion. Three teeth 61 protrude leftward from the center in the left-right direction of the plate member 6. That is, the three teeth 61 protrude toward the inside of the body cover 2. Each tooth 61 extends to the position of the left edge of the rear surface of the opening and closing door 51. The upper edge of each tooth 61 is inclined so that the protruding end side (left side) is lower than the root side (right side). The lower edge of each tooth 61 is perpendicular to the left edge 6 a. The lower edge of the tooth 61 may be not exactly perpendicular to the left edge 6a, but may be perpendicular with a deviation of several degrees or less. The lower edge of the upper tooth 61a is connected to the upper edge of the central tooth 61 b. The lower edge of the center tooth 61b is connected to the upper edge of the lower tooth 61 c. The gap 62 has a triangular shape when the plate member 6 is viewed from the front, and extends along the teeth 61. An upper gap 62a is formed on the lower side of the upper teeth 61 a. The upper gap 62a is formed on the upper side of the center tooth 61 b. The lower edge of the upper gap 62a, i.e., the upper edge of the center tooth 61b, is inclined so that the left side is lower than the right side. A central gap 62b is formed on the lower side of the central tooth 61 b. The central gap 62b is formed on the upper side of the lower teeth 61 c. The lower edge of the center gap 62b, i.e., the upper edge of the lower tooth 61c, is inclined so that the left side is lower than the right side. A lower gap 62c is formed at the lower side of the lower teeth 61 c. The lower edge of the lower gap 62c is inclined so that the left side is lower than the right side. The center gap 62b extends closer to the right edge 6b than the upper gap 62 a. The right end of the center gap 62b is located on the right side of the right end of the upper gap 62 a. The lower gap 62c extends closer to the right edge 6b than the central gap 62 b. The right end of the lower gap 62c is located on the right side of the right end of the center gap 62 b. The right edge 6b side of the plate member 6 corresponds to the second edge side. The center gap 62b corresponds to a first gap and the upper gap 62a corresponds to a second gap when viewed from the center tooth 61 b. The lower gap 62c corresponds to a first gap and the central gap 62b corresponds to a second gap when viewed from the lower tooth 61 c. The number of teeth 61 and gaps 62 of the comb-teeth portion 63 is not limited. The number of teeth 61 may be one, or three or more. The number of the gaps 62 may be one, or three or more.

The coolant is splashed by the coolant discharged to the workpiece or the tool, or is discharged to the inner surface of the main body cover 2, so that the coolant adheres to the left surface of the right wall 23 and the left surface of the opening/closing door 51. As described above, the coolant adheres to the baffle 535 and the baffle 536. The coolant adhering to the left surface of the right wall 23, the left surface of the opening/closing door 51, the baffle 535, and the baffle 536 moves to the outside of the main body cover 2 via the rear surface of the opening/closing door 51 due to vibration, impact, and the like when the opening/closing door 51 is opened or closed. The outside of the body cover 2 is the right surface of the opening/closing door 51. Since the plate member 6 is attached to the rear surface of the opening/closing door 51, the coolant that attempts to move to the outside of the body cover 2 via the rear surface of the opening/closing door 51 comes into contact with the comb teeth 63. The coolant in contact with the comb teeth 63 moves leftward along the inclined edge of the teeth 61 or the gap 62, moves inward of the body cover 2, and drops toward the lower portion of the machine tool body 1. The pump device 4 recovers the coolant dropped to the lower portion of the machine tool body 1 and reuses it. The machine tool 100 can prevent the coolant from moving to the outside of the body cover 2.

The coolant adhering to the vicinity of the upper portion of the opening/closing door 51 and to the

baffles

535 and 536 is easily moved to the outside of the main hood 2 by the opening/closing of the opening/closing door 51. Since the comb teeth 63 are provided at the upper end of the left edge portion 6a of the opening/closing door 51, the coolant adhering to the vicinity of the upper portion of the opening/closing door 51 is likely to contact the comb teeth 63 when moving to the outside of the main body cover 2. The machine tool 100 can effectively prevent the coolant adhering to the vicinity of the upper portion of the opening/closing door 51 from moving to the outside of the body cover 2. The comb teeth 63 may be provided at least at the upper end of the left edge 6 a. The comb teeth 63 may be provided at the center or the lower end of the left edge portion 6a in addition to the upper end of the left edge portion 6 a. The comb teeth 63 may be provided on the entire left edge portion 6 a.

The coolant that attempts to move to the outside of the body cover 2 sometimes moves to the outside of the body cover 2 along the surface of the plate member 6 without contacting the comb teeth 63 or dropping after contacting the comb teeth 63. When the coolant moves to the outside of the body cover 2 along the surface of the plate member 6, the coolant moves downward by gravity. When the coolant that contacts the upper teeth 61a or the edge of the upper gap 62a moves along the surface of the plate member 6 without dropping, the center gap 62b and the lower gap 62c extend closer to the right edge 6b than the upper gap 62a, and therefore the coolant easily contacts the edge of the center gap 62b or the edge of the lower gap 62 c. Since the gap 62 formed below a certain tooth 61 extends further to the right edge portion 6b side than the gap 62 formed above the certain tooth 61, the machine tool 100 can effectively prevent the coolant from moving to the outside of the body cover 2. When the center gap 62b extends closer to the right edge 6b than the upper gap 62a, the lower gap 62c does not need to extend closer to the right edge 6b than the center gap 62 b. The right-left direction position of the right end portion of the lower gap 62c may be the same as the right-left direction position of the right end portion of the center gap 62 b.

Modification example

As shown in fig. 13, in the plate member 6 of the modified example, three teeth 61 protrude to the left side of the left edge of the rear surface of the opening/closing door 51. The teeth 61 of the modification project further toward the inside of the body cover 2 than the teeth 61 of embodiment 1, and are longer in the left-right direction. Since the teeth 61 are long in the left-right direction, the coolant is easily guided to the inside of the body cover 2. The effect of the opening/closing door 51 on preventing the coolant from moving to the outside of the main shroud 2 is improved.

Embodiment mode 2

In the configuration of embodiment 2, the same components as those in embodiment 1 are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in fig. 14, in the plate member 6 according to embodiment 2, a notch portion 64 is provided at the center in the left-right direction of the lower edge portions of the three teeth 61. Notch 64 has a square shape when plate member 6 is viewed from the front. The coolant in contact with the comb-teeth 63 may move rightward along the lower edges of the teeth 61 toward the outside of the main body cover 2 without dropping from the comb-teeth 63. The notch 64 prevents the coolant from moving along the lower edge of the tooth 61 to the outside of the body cover 2. The opening/closing door 51 can effectively prevent the coolant from moving to the outside of the main shroud 2.

The position of the notch 64 is not limited to the center of the lower edge of the tooth 61 in the lateral direction, and may be set as appropriate as long as it is at the lower edge of the tooth 61. The positions of the notch portions 64 of the teeth 61 may be different from each other. The notch 64 may be provided on the left side of the lower edge of the upper tooth 61a, the center in the lateral direction of the lower edge of the center tooth 61b, and the right side of the lower edge of the lower tooth 61 c. The notch 64 may be provided only in a part of the teeth 61. The cutout 64 may be provided only on the upper tooth 61a or only on the upper tooth 61a and the central tooth 61 b.

Embodiment 3

In the configuration of embodiment 3, the same components as those in embodiment 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in fig. 15, in the plate member 6 according to embodiment 3, the upper edge portion of each tooth 61 is inclined so that the projecting end side is lower than the root side, as in embodiment 1. The lower edge of each tooth 61 is inclined so that the projecting end side is lower than the root side, similarly to the upper edge of the tooth 61. The upper edge and the lower edge of each tooth 61 are parallel. The upper edge and the lower edge of the teeth 61 may be not strictly parallel but parallel with a deviation of several degrees or less. The gap 62 has a square shape when the plate member 6 is viewed from the front, and extends along the teeth 61. Since the lower edge portion of the tooth 61 corresponds to the upper edge portion of the gap 62, the upper edge portion of each gap 62 is inclined so that the left side is lower than the right side. The coolant in contact with the comb-teeth 63 moves along the teeth 61 and the upper and lower edges of the gap 62 toward the inside of the body cover 2, and drips down to the lower portion of the machine tool body 1. Since the lower edges of the teeth 61 (the upper edges of the gaps 62) are inclined as described above, the coolant in contact with the comb-teeth portions 63 does not move rightward along the lower edges of the teeth 61 and moves outward of the main body cover 2. The opening/closing door 51 can effectively prevent the coolant from moving to the outside of the main shroud 2.

Claims

1. A machine tool (100) comprises:

a machine tool body (1); a shroud, enclosing the machine body, having a top (25) and side walls; and an opening/closing door (51) provided on the side wall and moving in a direction orthogonal to the thickness direction of the side wall,

the machine tool comprises a plate member (6) extending in the vertical direction and attached to an end surface of the opening/closing door in the moving direction,

the plate member has a first edge portion extending in the vertical direction and closer to the machine tool body,

a comb-shaped portion (63) having at least one tooth (61) is formed at the first edge portion,

the teeth protrude towards the inside of the shield,

the upper edge portion of the tooth is inclined so that the protruding end side is lower than the root portion side.

2. The machine tool of claim 1,

the comb teeth portion is provided at least at an upper end of the first edge portion.

3. The machine tool according to claim 1 or 2,

the lower edge of the tooth is provided with a notch part (64).

4. The machine tool according to claim 1 or 2,

the plate member has a second edge portion extending in the up-down direction and closer to a side opposite to the side where the first edge portion is located,

a first gap is formed below the teeth and extends along the teeth, and a second gap is formed above the teeth and extends along the teeth.

5. The machine tool according to claim 1 or 2,

the machine tool comprises:

a groove (56) extending in the moving direction and formed in an upper side surface of the opening/closing door; and

and a drain hole (57) formed in the groove portion for discharging the liquid to the inside of the shield.